For a desktop PC is it bad to leave the side panel to it's case off? Initially I thought it would help cooling (and allow me easy access) but wondered if it lets more dust in. Any other pros and cons? Obviously this is in a safe area and no likely to get bumped.
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The principle of air cooling, as described well in this ExtremeTech guide, is to create either positive or negative air pressure within the case. Both have pros and cons, and there's tons of disagreement over optimal fan placement, but the point is: bring cool air in, heat it up, and get it out. When you remove the side panel, you disrupt the intended airflow of the case—whatever it may be—and also invite more dust to settle on your components. So it's not recommended.
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